結果 : how long is the longest underwater tunnel
5:38

How the world's longest underwater tunnel was built - Alex Gendler

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How Europe's Building the World's Longest Underwater Tunnel!

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Inside the $8.7BN Fehmarn Belt Tunnel: The World's Longest Underwater Connection

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Unbelievable! The sea is full of water, how is the undersea tunnel built?

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Longest Man Made Tunnel of the world #tunnel #world #top5 #manmade #longest

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Inside Norway's $47 Billion Floating Highway

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The Longest Underwater Tunnel | China's Future MEGAPROJECTS: Part 5

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WORLD'S LONGEST UNDERWATER TUNNEL

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The Longest Underwater Tunnel in the World

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A look at the World's Longest Underwater Tunnel that Costs $7 BILLION!

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世界最長の海底トンネルはいかにして建設されたか

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Germany and Denmark are building the world's longest underwater rail and road tunnel | DW News

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China’s Longest UNDERWATER Tunnel Completed

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How China Built the World’s Largest Underwater Tunnel in 110 Days?

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How Taihu Tunnel, China's longest underwater tunnel was built?

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Deepest Road Tunnel in the World

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How Underwater Tunnels Are Built?

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